Goldstar FFH-8970AX Service Manual IC
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INTERNAL BLOCK DIAGRAM OF ICs
■ FAN8039BD3
5-CH Motor Diver
Description
The FAN8039BD3 is a monolithic integrated circuit suitable for a 5-CH motor driver which drives the
tracking actuator, focus actuator, sled motor, tray motor, spindle motor of the DVDP/CAR-CD systems.
28
2627
25 24 23 22
1 32 4 5 6 7
211920 18
17
16 15
8109
11
12
13 14
DO1-
DO
1+
IN1
REGVCC
REB
REO
RESX
GND1
FWD
IN2
DO 2+
DO 2-
GND2
REV
DO 5+
DO5-
DO 3-
DO 3
+
IN3
CTL
VCC1
VCC
VREF
PS
IN4
DO 4+
DO4
-
GND3
TSD
10K
10K
10K
10K
2.5V
Regulator
Level
Shift
Level
Shift
COMP
2
2
2 2
2 2
FIN
(GND)
FIN
(GND)
Level
Shift
Level
Shift
10K
10K
Level
Shift
2
2
PS
RESX
FUNCTION
H
H
H
L
L
H
L
L
All Active
Reg. Only Deactive
Reg. Only Active
All Deactive
Pin Definitions
NO Symbol Description NO Symbol Description
1DO1-CH1 Drive Output (-) 15 GND2 Power Ground1 (CH 2,3,5)
2DO1+CH1 Drive Output (+) 16 DO5+ CH5 Drive Output (+)
3IN1 CH1 Drive Input 17 DO5- CH5 Drive Output(-)
4REGVCC Regulator Supply Voltage 18 DO3- CH3 Drive Output(-)
5REB Regulator Output 19 DO3+ CH3 Drive Output (+)
6REO Regulator Feedback Input 20 IN3 CH3 Drive Input
7RESX Regulator Reset 21 VCC1 Supply Voltage1(CH2,CH3,CH5)
8GND1 Signal Ground 22 PS Power Save
9CTL CH5 Motor Speed Control 23 VREF Bias Voltage
10 FWD CH5 Forward Input 24 VCC Supply Voltage(CH1,CH4)
11 REV CH5 Reverse Input 25 IN4 CH4 Drive Input
12 IN2 CH2 Drive Input 26 DO4+ CH4 Drive Output (+)
13 DO2+ CH2 Drive Output (+) 27 DO4- CH4 Drive Output (-)
14 DO2- CH2 Drive Output (-) 28 GND3 Power Ground2 (CH 1,4)
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■ KA78R33
Low Dropout Voltage Regulator
Description
The KA78R33 is a low-dropout voltage regulator suitable for various electronic equipments. It provides
constant voltage power source with TO-220 4 lead full mold package. Dropout voltage of KA78R33 is
below 0.5V in full rated current(1A). This regulator has various function such as peak current protection,
thermal shut down, overvoltage protection and output disable function.
Internal Block Diagram
THERMAL SHUTDOWN
BANDGAP REFERENCE
OVERVOLTAGE
PROTECTION
SOA PROTECTION
SHORTCIRCUIT
PROTECTION
1
4
3
2
Vin
Vdis
Vo
GND
HIGH / LOW
OUTPUT
ON / OFF
Q1
R1
R2
-
+
+
1.4V
-
CIRCUIT
■ LC72131
AM/FM PLL Frequency Synthesizer
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B01 B02 B03 B04 I01 I02
XIN
PD
AIN
AOUT
IFIN
XOUT
FMIN
AMIN
CE
DI
CL
D0
VDD
VSS
REFERENCE
DIVIDER
PHASE DETECTOR
CHARGE PUMP
UNLOCK
DETECTOR
UNIVERSAL
COUNTER
DATA SHIFT REGISTER
LATCH
12bits PROGRAMMABLE
DIVIDER
SWALLOW COUNTER
1/16. 1/17 4bits
POWER
ON
RESET
CCB
I/F
1
2
Block Diagram
■ LA1837
Single-Chip Home stereo IC with Electronic Tuning Support
The LA1837 is a single-chip AM/FM IF and MPX IC that supports electronic tuning and was developed for
use in home stereo systems. It is optimal for use in automatic station selection systems that use the SD and
IF counting techniques.
Block Diagram
FM SD
ADJ
3 rd 5 th
DECODER
ANTI-BIRDIE
FM
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